Improvement in mining-drills



1-". B. PARRISH. Mining-Drill.

N0. 220,863. Patented Oct. 21, 1879.

INVENTOR:

' Wilkesba-rre,

UNITED STATES PATENT OFFICE FREI). B. PARRISI-I, OF VVILKESBARRE, PENNSYLYANIA.

IMPROVEMENT IN MlNlNG-DRILLS.

Specification forming art of LdvtersPatent N0. 220,863, dated Oci:ober 21, 1879; application filed April 8, 1879.

T0 all whom 1t mag; concem:

Be it known thz1t I, FRED. B. PARRISH, of in the county of Luzerne 21ml State of Pennsylvania, have invented 21 uew and Improved Drill, of which t-l1e tbllowing is 21 specificz1tion. The invention consists in co1nbining, with 21 drill-shaft arm having slotted recessed j21ws,

z1nd 21 crank-screw 011 the 2111ger21 pivoted nut having pins 011 opposite sides and made solicl, as hereinafter deseribed.

In the accompanying drawings, Figure 1 is 21 side elevation of 111y improvement. Fig. 2 is 21 section of the inserted. end of the stock 21m1 Wedge 0n line w x; and Fig. 3 is 21 t0p view.

Similar letters 0f referenee indici1t0 corresponding parts.

Referring t0 tl1e drz1wings,A represents tl1e shaft of the drill-stock, tl1e inserted 011d a whereof h'as 011 its rounded side V-shaped ribs b, while the edge or side 0f the shaft--be1ek 0f these is fl211:.

B is a wedge, flz1t 011 one side where it is applied t0 the back of the shaft-, and tapering on the other.

The upper end of the shaft has 21 right-21ngulz1r arm, O, terminatingin ja1ws c c, with open slots d, extending imvz1rd fro1n the ends, 2111d having semicircular recesses e 011 the upper side 21t the end.

D is the threadedsoeket; or nut, through whicl1 is passed tl1e serevv-shank f of the Grill E, Whi0h is provided with 21 winch, F, f01 turning il:.

011 opposite sides 0f s.ocket D are plus g g, projeeting out 21t right angles, forming piv0ts, wl1ich are passed in t-l1e slots d 10 the recesses e, in whieh they 211e held ancl fi11d 21 bearin g, as clearly shown in Fig. 1.

'lhe device is used as follows: Ahole is first made with 21 pick karge enough to receive the end a, whieh is then inserted. The wedge B is then driven in between tl1e flat side of 011d a, and the side 0f the hole 130 force 1:he V- shaped ribs 111 the side of the hole, and t0 tighten, by this means, and by the pressure 1'l: exerts, the shafl: in plz1ce.

'Ihe drill is tl1en connected with the stock by insert-ing the nut 01 socket D between the jaws with the pivots in the slots d, and resting in the reeesses e, the drill is then turned l05' mea'ns 0f the crank F, until the bit is forced into the 00211 tl1e entire length 0f' the serewsh2111k f. II; is now reversed for two or three turns, until the pivots 211e moved 01113 0f the recesses e, and loosened, when the n11t is lifted 01117 0f the slot and the bit witl1drawn fro1n tl1e hole; another longer bil: is 110W placed in tl1e stock and the work proceeds 21s before.

The a1ran gement of the stock 01' holder, with the open jaws f01' receiving the 111117 01 screwsockeb enables 1ne to use 21 worm-shaped (l1ill less than ten inches long, while die pivota1l connection 0f the 1111t1) With the jaws enz1bles me t0 sei; the drill at 21ny angle thz1t I may wish t0 drill the hole.

I am aware tha it is not new t0 use 21 spirally-twisted drill, 01 21 sliding box on 21 sliding-rod having pins to enter curved slots in box, 01 21- disk whose position 02111 be chz1nged, so that the drill may be worked in different directions.

Having thus described my invention, 1 clai1n as new 2111d desire t0 secure by Letters Patent 'Il1e eombination, with the arm O, of drillstoek shaft, l1aving ja-ws c o, with sl0ts d, and recess'es e, and t-l1e erank-screw f 011 the auger, 0f the pivoted 111111 D, having plus g g 011 opposite sides and made solid, as shown and (lescribed.

FRED. BROWN PARRISH.

Witnesses:

JOHN W. GILGHRIST, W. H. COLEMAN. 

